TRY...CATCH

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TRY...CATCH

Venkat Jonnalagadda

Mr or Mrs. 500

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April 1, 2013 at 8:20 pm

#394505

Comments posted to this topic are about the item TRY...CATCH
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If I can answer a question then anyone can answer it..trying to reverse the logic.. :hehe:
April 2, 2013 at 2:41 am

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Vinay Kumar SSCertifiable Points: 6099 More actions · Answer 1

Good one. New thing come to know.

Thank. Keep it up !!! 🙂

Thanks
Vinay Kumar
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Keep Learning - Keep Growing !!!

kapil_kk SSC-Insane Points: 21316 More actions · Answer 2

Good question :-):-)

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Bangla Hall of Fame Points: 3137 More actions · Answer 3

Bangla

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April 1, 2013 at 11:43 pm

#1602672

Nice....

Hugo Kornelis SSC Guru Points: 64780 More actions · Answer 4

Good question, but the explanation falls a bit short. I was very disappointed when I first saw this behaviour. A semicolon is a statement terminator and should be used after every statement - but apparently, END TRY is not considered a statement by this logic. So the semicolon after END TRY is not interpreted as terminating the END TRY, but as terminating a dummy, zero-length statement. (They exist. Try typing a bunch of semicolons and hit execute - it will complete without errors).

In short - just after I had learned myself to consistently semicolon-terminate every statement, I now have to leanr myself NOT to do that for at least one statement (END TRY).

Hugo Kornelis, SQL Server/Data Platform MVP (2006-2016)
Visit my SQL Server blog: https://sqlserverfast.com/blog/
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Bob JH Cullen SSCrazy Points: 2082 More actions · Answer 5

I selected the syntax error option but not for the reason stated. The question states SQL 2005 and higher, but THROW evidently makes its appearance with SQL 2012, so is invalid syntax is the right answer for 2005, 2008, 2008 R2, eh?

So, another case of "it depends".

Andrew Watson-478275 SSCarpal Tunnel Points: 4652 More actions · Answer 6

Hugo Kornelis (4/2/2013)
Good question, but the explanation falls a bit short. I was very disappointed when I first saw this behaviour. A semicolon is a statement terminator and should be used after every statement - but apparently, END TRY is not considered a statement by this logic. So the semicolon after END TRY is not interpreted as terminating the END TRY, but as terminating a dummy, zero-length statement. (They exist. Try typing a bunch of semicolons and hit execute - it will complete without errors).
In short - just after I had learned myself to consistently semicolon-terminate every statement, I now have to leanr myself NOT to do that for at least one statement (END TRY).

Thanks for clearing that up Hugo - I was scratching my head trying to work out where the extra statement between the try and the catch was.

manik_anu SSCrazy Points: 2377 More actions · Answer 7

+1... nice question to learn about TRY-Catch....

Learn new things every where

Manik

Manik
You cannot get to the top by sitting on your bottom.

manik_anu SSCrazy Points: 2377 More actions · Answer 8

Hugo Kornelis (4/2/2013)
Good question, but the explanation falls a bit short. I was very disappointed when I first saw this behaviour. A semicolon is a statement terminator and should be used after every statement - but apparently, END TRY is not considered a statement by this logic. So the semicolon after END TRY is not interpreted as terminating the END TRY, but as terminating a dummy, zero-length statement. (They exist. Try typing a bunch of semicolons and hit execute - it will complete without errors).
In short - just after I had learned myself to consistently semicolon-terminate every statement, I now have to leanr myself NOT to do that for at least one statement (END TRY).

+1... nice....

Manik
You cannot get to the top by sitting on your bottom.

Koen Verbeeck SSC Guru Points: 259085 More actions · Answer 9

Definately learned something about the odd behaviour of SQL Server...

Need an answer? No, you need a question
My blog at https://sqlkover.com.
MCSE Business Intelligence - Microsoft Data Platform MVP

Dana Medley SSCertifiable Points: 6764 More actions · Answer 10

Stewart "Arturius" Campbell (4/2/2013)
Hugo Kornelis (4/2/2013)
Good question, but the explanation falls a bit short. I was very disappointed when I first saw this behaviour. A semicolon is a statement terminator and should be used after every statement - but apparently, END TRY is not considered a statement by this logic. So the semicolon after END TRY is not interpreted as terminating the END TRY, but as terminating a dummy, zero-length statement. (They exist. Try typing a bunch of semicolons and hit execute - it will complete without errors).
In short - just after I had learned myself to consistently semicolon-terminate every statement, I now have to leanr myself NOT to do that for at least one statement (END TRY).
+1
what a gotcha...

+1. The thought of this weird behavior happening never even crossed my mind. Great question.

Everything is awesome!

Venkat Jonnalagadda Mr or Mrs. 500 Points: 510 More actions · Answer 11

Hugo Kornelis (4/2/2013)
Good question, but the explanation falls a bit short. I was very disappointed when I first saw this behaviour. A semicolon is a statement terminator and should be used after every statement - but apparently, END TRY is not considered a statement by this logic. So the semicolon after END TRY is not interpreted as terminating the END TRY, but as terminating a dummy, zero-length statement. (They exist. Try typing a bunch of semicolons and hit execute - it will complete without errors).
In short - just after I had learned myself to consistently semicolon-terminate every statement, I now have to leanr myself NOT to do that for at least one statement (END TRY).

+1..

Thanks Hugo for the explanation and helping me out on this one. This is my first Qotd and I had this whole zero length statement explanation set up but for some reason got mixed up and posted the condensed version. As usual you are there to help out all the newbies like me.. Your posts are always very insightful..

Go Hugo !!! 😀

___________________________________________________________________
If I can answer a question then anyone can answer it..trying to reverse the logic.. :hehe:

Lon-860191 SSCrazy Points: 2449 More actions · Answer 12

Good question, but I agree that SQL is not easy when it comes to the use of the semi-colon, compared to C#.

Thanks,

Lon

SQLRNNR SSC Guru Points: 281334 More actions · Answer 13

Bob Cullen-434885 (4/2/2013)
I selected the syntax error option but not for the reason stated. The question states SQL 2005 and higher, but THROW evidently makes its appearance with SQL 2012, so is invalid syntax is the right answer for 2005, 2008, 2008 R2, eh?
So, another case of "it depends".

That is the same reason I saw the problem with the code. THROW on 2005,2008 and R2 will fail with a syntax error as well.

Jason...AKA CirqueDeSQLeil
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